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Analog Devices Inc. LTC3290IMSE#PBF
- Part No.:
- LTC3290IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3290IMSE#PBF.pdf
- Description:
- IC REG BOOST ADJ 50MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:128
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Product details
Overview
LTC3290IMSE#PBF from Analog Devices is a high-voltage boost charge pump IC supporting 4.5V to 55V input and auxiliary supply ranges, delivering up to 50mA output current with 15µA VIN quiescent current and reverse input protection to –55V. It operates in standard boost or VIN-tracking mode, enabling precise high-side N-FET gate drive and industrial power switching supplies.
For engineers reviewing the LTC3290IMSE#PBF datasheet, LTC3290IMSE#PBF pinout, LTC3290IMSE#PBF application, or LTC3290IMSE#PBF equivalent, key selection criteria include its dual-supply boost architecture, 10-pin MSOP thermal performance, hysteretic Burst Mode® regulation, and AEC-Q100 qualification for automotive VIN-tracking supplies.
Technical Context
The LTC3290IMSE#PBF implements a 250kHz fixed-frequency switched-capacitor boost topology using external flying capacitor (CFLY) and dual input rails (VIN, VAUX). Its internal oscillator drives four MOSFET switches (S1–S4) in complementary phases to transfer charge from VAUX to VOUT via VIN-referenced pumping.
Regulation is achieved either through FB pin servoing to 1.00V (boost mode) or mirrored reference current generation between FB and VSET pins (tracking mode), where output offset voltage is set solely by external R1/R2 resistor ratios - independent of temperature drift or supply variation within operating limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V on both VIN and VAUX rails - enables operation across 12V/24V/48V industrial and automotive battery systems. |
| Max Output Current | 50mA continuous - sufficient for driving high-side N-FET gates or biasing isolated control circuitry. |
| VIN Quiescent Current | 15µA typical in Burst Mode - minimizes standby power loss in always-on vehicle subsystems. |
| Output Regulation Accuracy | ±2% at FB pin (0.98V–1.02V) - ensures stable 15V or (VIN + 10V) tracking outputs under load and temperature variation. |
| Thermal Protection Threshold | Junction shutdown at ~175°C, recovery at ~165°C - protects against sustained overload without requiring external thermal management. |
| Package Thermal Resistance | θJA = 45°C/W with exposed pad soldered - supports 1.5W+ dissipation in compact 10-lead MSOP layout. |
| Reverse Input Rating | –55V on VIN/VAUX - safeguards against battery jump-start transients and load-dump events in automotive environments. |
Pinout & Package
The LTC3290IMSE#PBF is housed in a thermally enhanced 10-lead plastic MSOP package with exposed ground pad (Pin 11), requiring PCB soldering for rated thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAUX (1) | Auxiliary supply input | Provides upper voltage rail for charge transfer; must be bypassed with ≥10µF ceramic capacitor to GND. |
| EN (2) | Enable logic input | Active-high TTL/CMOS-compatible control; threshold 1.1V rising / 0.4V falling - enables system-level power sequencing. |
| C+ (3) | Flying capacitor positive node | Switches between VAUX and VOUT; carries high di/dt - requires short, low-inductance trace routing. |
| C– (4) | Flying capacitor negative node | Switches between VIN and ground; critical for charge transfer phase timing - must avoid coupling to FB/VSET. |
| VIN (5) | Main input supply | Primary power source; reverse-protected to –55V - suitable for direct connection to vehicle battery rails. |
| BIAS (6) | Internal bias voltage output | 4.5V regulated supply for internal circuitry; requires 4.7µF ceramic bypass - not for external loading. |
| PGOOD (7) | Open-drain power-good flag | Asserts high-Z when VOUT reaches 95–98% of target - interfaces directly with µC reset or enable logic via pull-up. |
| FB (8) | Feedback reference input | Servos to 1.00V in boost mode; sources reference current in tracking mode - sets output accuracy and stability. |
| VSET (9) | Tracking voltage set input | Grounded for boost mode; connected to VOUT via R2 in tracking mode - defines offset above VIN with resistor ratio precision. |
| VOUT (10) | Regulated output voltage | Delivers boosted or tracked output; bypassed to GND (boost) or VIN (tracking) - determines system rail integrity. |
| GND (11) | Exposed thermal pad / ground | Must be soldered to PCB ground plane - provides primary thermal path and low-impedance return for all internal currents. |
Key Features
| Feature | Design Value |
|---|---|
| Wide dual-input voltage range | Independent 4.5V–55V operation on VIN and VAUX allows flexible sourcing from battery + auxiliary rail or split supplies for high-efficiency boosting. |
| Hysteretic Burst Mode® regulation | Reduces VIN quiescent current to 15µA at light loads while maintaining tight output regulation via programmable hysteresis window. |
| VIN-tracking capability | Configurable fixed-offset output (e.g., VOUT = VIN + 10V) using only two external resistors - eliminates need for separate error amplifier or reference. |
| Integrated protection suite | Short-circuit current limiting (150mA typ), thermal shutdown (~175°C), and reverse input rating (–55V) ensure robustness in harsh environments. |
| AEC-Q100 qualified | Rated for –40°C to 125°C junction temperature - validated for automotive body electronics, ADAS sensors, and infotainment power rails. |
Applications
| High-Side N-FET Driver | Automotive VIN-Tracking Supply |
|---|---|
Use Scenario: Driving gate of high-side N-channel MOSFET in 12V/24V automotive power distribution modules with inrush limiting and load disconnect. IC Role / Device Role / Timing Role: Generates precise (VIN + 10V) gate drive voltage referenced to source terminal, enabling full enhancement of N-FET with minimal conduction loss. Use Value: Eliminates need for isolated DC/DC or transformer-based gate drivers; leverages existing battery rail while maintaining >10V VGS margin across cold-crank conditions. | Use Scenario: Providing stable 12V or 15V auxiliary supply in vehicles where main battery voltage varies from 6V (cold crank) to 16V (load dump). IC Role / Device Role / Timing Role: Regulates output as fixed offset above measured VIN - tracks battery voltage dynamically while preserving headroom for downstream LDOs or analog circuitry. Use Value: Maintains functional operation during deep discharge or alternator transients without brownout resets; reduces BOM count vs discrete op-amp + pass transistor solutions. |
| Industrial High-Voltage Bias Supply | Programmable Boost Converter for Sensors |
Use Scenario: Generating 42V bias for industrial solenoid drivers or piezoelectric actuators powered from 24V factory bus. IC Role / Device Role / Timing Role: Acts as non-isolated boost converter using 24V main supply and 12V auxiliary rail to achieve 42V output with <1% ripple in Burst Mode. Use Value: Achieves >85% efficiency at 20mA load without inductors - simplifies EMI filtering and enables ultra-thin PCB designs in space-constrained PLC modules. | Use Scenario: Powering wide-dynamic-range analog front-ends (e.g., strain gauge bridges, RTD interfaces) requiring clean, adjustable excitation voltage. IC Role / Device Role / Timing Role: Provides user-programmable output (1V to VIN + VAUX) via external resistor divider on FB/VOUT/GND - supports 3.3V, 5V, or 10V sensor bias with single component. Use Value: Enables field calibration of sensor gain without hardware change; 15µA quiescent current extends battery life in portable diagnostic tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3261EMSE#PBF | Inverting topology; 4.5V–32V input; 100mA output; no VIN-tracking mode; higher IQ (25µA) | Generates negative rail instead of positive boost; suited for dual-supply op-amps or ADC references, not high-side FET drive. | Select LTC3290IMSE#PBF when positive boosted/tracked output is required; choose LTC3261 for bipolar supply generation. |
| LTC3256EFE#PBF | Dual-output (350mA step-down + 50mA boost); 5.5V–38V input; integrated watchdog timer; larger 20-pin TSSOP package | Targets multi-rail systems needing both buck and boost; lacks reverse input protection and AEC-Q100 qualification. | Choose LTC3290IMSE#PBF for single-rail automotive tracking or industrial boost with ruggedized specs; use LTC3256 for complex multi-output industrial controllers. |
Compared with LTC3261EMSE#PBF and LTC3256EFE#PBF, the LTC3290IMSE#PBF uniquely combines VIN-tracking capability, –55V reverse input tolerance, and AEC-Q100 qualification in a compact 10-pin MSOP - making it the only option for automotive high-side gate drive and battery-following bias supplies.
Availability
LTC3290IMSE#PBF is available at Aetrix Electronics and suitable for automotive power switching, industrial high-voltage biasing, and sensor excitation applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for LTC3290IMSE#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3290 product line delivers high-voltage, low-quiescent-current charge pump solutions optimized for automotive-grade tracking supplies and industrial power conversion where inductors are undesirable.
FAQ
What is the maximum output voltage achievable with the LTC3290IMSE#PBF?
The LTC3290IMSE#PBF limits maximum output voltage to the sum of VIN and VAUX, capped at 55V per Absolute Maximum Ratings. In practice, output is constrained by external resistor selection and effective open-loop resistance (ROL); for example, with VIN = 12V and VAUX = 5V, VOUT is limited to ≤17V under 50mA load due to ROL-induced droop. The device's overvoltage protection triggers at 63–67V on VOUT.
How does the LTC3290IMSE#PBF implement VIN-tracking mode?
The LTC3290IMSE#PBF enters VIN-tracking mode when VSET is left ungrounded and connected to VOUT via external resistor R2, while FB is tied to GND via R1. An internal current mirror replicates the 1V/R1 reference current into R2, generating a fixed offset voltage (1V × R2/R1) above VIN. This architecture avoids dependency on VAUX voltage stability and enables true tracking even during VAUX transients.
Can the LTC3290IMSE#PBF operate with only one input supply?
Yes - the LTC3290IMSE#PBF can operate with VAUX tied to VIN, though this reduces maximum achievable boost ratio and efficiency. When VAUX = VIN, the theoretical maximum VOUT = 2 × VIN, but practical output is limited by ROL and load current. VAUX must remain ≥4.5V regardless of VIN level; tying VAUX to a lower-voltage auxiliary rail (e.g., 5V) improves efficiency for moderate boost ratios like 12V→15V.
What is the role of the exposed pad (Pin 11) on the LTC3290IMSE#PBF package?
The exposed pad (Pin 11) on the LTC3290IMSE#PBF is electrically and thermally connected to GND. It must be soldered to a PCB ground plane using ≥6 thermal vias to achieve the specified θJA = 45°C/W and prevent thermal shutdown under 50mA load. Leaving the pad unsoldered degrades thermal performance by >30°C/W and risks intermittent regulation failure.
Does the LTC3290IMSE#PBF require external compensation components?
No - the LTC3290IMSE#PBF uses hysteretic Burst Mode® control with no external compensation required. Stability is inherent to the architecture; output regulation depends solely on FB voltage accuracy (±2%) and external resistor tolerances. Ceramic output capacitors (≥5µF) provide sufficient phase margin, and no RC networks or feedforward capacitors are needed for loop stability.
LTC3290IMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 55V
- Current - Output:
- 50mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3290IMSE#PBF FAQ
1.How can I place an order for LTC3290IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3290IMSE#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3290IMSE#PBF reliable?
The price and inventory of LTC3290IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3290IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3290IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3290IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3290IMSE#PBF?
LTC3290IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3290IMSE#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3290IMSE#PBF?
For technical support, including LTC3290IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3290IMSE#PBF requirements.
6.How does Aetrix verify that LTC3290IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3290IMSE#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3290IMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3290IMSE#PBF?
All LTC3290IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3290IMSE#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3290IMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3290IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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